sync: add WIFI_CREDENTIALS protobuf, ModelType, and preference

sync/protocol/proto_enum_conversions_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Keep this file in sync with the .proto files in this directory.
 
 #include "sync/protocol/proto_enum_conversions.h"
 
 #include <string>
 
@@ skipping 35 matching lines @@
       sync_pb::SyncEnums::PageTransition_MAX);
 }
 
 TEST_F(ProtoEnumConversionsTest, GetPageTransitionQualifierString) {
   TestEnumStringFunction(
       GetPageTransitionRedirectTypeString,
       sync_pb::SyncEnums::PageTransitionRedirectType_MIN,
       sync_pb::SyncEnums::PageTransitionRedirectType_MAX);
 }
 
+TEST_F(ProtoEnumConversionsTest, GetWifiCredentialSecurityClassString) {
+  TestEnumStringFunction(
+      GetWifiCredentialSecurityClassString,
+      sync_pb::WifiCredentialSpecifics::SecurityClass_MIN,
+      sync_pb::WifiCredentialSpecifics::SecurityClass_MAX);
+}
+
 TEST_F(ProtoEnumConversionsTest, GetUpdatesSourceString) {
   TestEnumStringFunction(
       GetUpdatesSourceString,
       sync_pb::GetUpdatesCallerInfo::GetUpdatesSource_MIN,
       sync_pb::GetUpdatesCallerInfo::PERIODIC);
   TestEnumStringFunction(
       GetUpdatesSourceString,
       sync_pb::GetUpdatesCallerInfo::RETRY,
       sync_pb::GetUpdatesCallerInfo::GetUpdatesSource_MAX);
 }
@@ skipping 20 matching lines @@
 
 TEST_F(ProtoEnumConversionsTest, GetActionString) {
   TestEnumStringFunction(
       GetActionString,
       sync_pb::SyncEnums::Action_MIN,
       sync_pb::SyncEnums::Action_MAX);
 }
 
 }  // namespace
 }  // namespace syncer